Average Co-Inventor Count = 3.00
ph-index = 3
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Matsushita Electric Industrial Co., Ltd. (3 from 27,375 patents)
3 patents:
1. 5122715 - Drive device for a brushless motor
2. 4970445 - Brushless motor drive device
3. 4900993 - Driving apparatus for brushless motor